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The effectiveness of under-air n-hexane oxidation over monolithic catalysts made of heat-resistant foil, containing Pt, Pd or Pt-Pd, was compared. Pt and Pd precursors, either containing chlorine or devoid of chlorine, were used to prepare the catalysts. The chlorine- containing Pt (H 2 PtCl 6 ) and Pd (PdCl 2 ) precursors were found to lower the activity of the catalysts in hexane oxidation. Studies of the effect of 0.15% Pt/Al 2 O 3  catalyst (using H 2 PtCl 6  as the precursor) calcination conditions on catalyst activity showed the catalyst calcined in static air at 500°C to be the most active. Airflow calcination of the catalyst does not change its catalytic properties. In comparison with the 0.5% Pd/Al 2 O 3  catalyst obtained from Pd(NO 3 ) 2 , the use of a bimetallic 0.5% Pd/0.1% Pt/Al 2 O 3  catalyst, in which the precursors were Pd(NO 3 ) 2  and Pt(NO 3 ) 4 , resulted in the lowering of 10% and 50% n-hexane temperature by 15°C and 10°C.

The effect of catalyst precursors and conditions of preparing Pt and Pd-Pt catalysts on their activity in the oxidation of hexane